Reversing mechanism.



No. 833,255. PATENTBD 00T. 16, 1906. c. P. SMITH.

REVERSING MEGHANISM.

APPLIOA'TION FILED JUNE 29, 190s.

lUNITED STATES lPATENT OFFICE.

CHARLES F. SMITH, OF MELROSE, MASSACHUSETTS, ASSIGNOR, BY MESNE ASSIGNMENTS, TO SMITH COUNTERSHAFT COMPANY, OF MELROSE, MASSACHUSETTS, A CORPORATION OF MASSACHU- SETTS.

REVERSING MECHANISM.

Specification of Letters Patent.

Patented Oct. 16, 1906.

different directions by a pulley-wheel or gear which rotates continuously in one direction only.

It is the purpose of the present invention to arrange a device of this kind so that two different speeds can be obtained in one direction and a single speed obtained in the reverse direction, a further feature of the in- -vention being embodied in an arrangement whereby a single shipper member can be utilized to obtain the desired operation.

The invention is herein shown as embodied in a lathe counter-shaft driven by an ordinary belt-pulley, it being obvious, however, that the same reversing mechanism can be used with other driving mechanism.

Figure 1 is a longitudinal section, partly in elevation, of a reversing mechanism embodying the invention. Fig. 2 is a section taken on line a02 of Fig. l looking toward the left and Fig. 3 is adetail view of a portion of Fig. 1, showing the parts in a different position.

The pulley al is shown as provided with a hub-bearing portion c2, upon which is fixed a lgear-wheel 0,3, the said hub having a bearing upon a sleeve b, Which in turn bears upon the driving member or shaft c, the pulley a being normally free to rotate on the sleeve b, while the sleeve is free to rotate on the shaft 0 the shaft of course being free to rotate within the sleeve if the latter is stationary.

The sleeve b carries one or more gearwheels b2, three of such gear-Wheels being herein" shown, Fig. 2, as mounted to rotate upon bearing-spindles b3, projecting inward from spider-arms b4, which extend radially from the sleeve b. The said gears b2 are in mesh with the gear a3 upon the pulley-hub a2 and also with an internal gear d2, formed on a `shoulders c4, 142, c5, and

sleeve d, which is separate from the sleeve b, but mounted upon the shaft c in a similar manner. The gears b2 are shown'as inclosed in a casing, the internal gear d2 having a cover portion in the form of a disk d20, having a bearing on the hub a2 and being fastened to the face of the internal gear member. The intermediate gears, therefore', are completely inclosed in a casingwhich may be filled with a lubricant.

Each of the sleeves b and d is arranged to be held stationary or to be connected with the shaft c, the said sleeves being shown as provided, respectively, with friction-disks b5 and b and d3 and d4, which form clutch members to cooperate, respectively, with disks c2 and 66, c3 and d4", the disks c2 and c3 being splined upon the shaft c, While the disks 66 and d are held stationary, so as to prevent the rotation of the sleeves b and d when clutched thereto.

As herein shown, the disks bm and d4 are supported, respectively, upon the sleeves b and d for convenience in construction and are longitudinally movable thereon, but prevented from rotation by means of loops or straps bm and d, which firmly hold them without preventing the slight longitudinal movement which is necessary to bring the said disks into frictional engagement With their cooperating members.

As a convenient means for producin the slight longitudinal movement of the c utch members to cause the operation thereof the fixed or stationary members d3 and d4 and b5 and b are provided with levers @,f, g, and h, pivotally connected to the said members, being substantially in the shape of elbow-levers, respectively, having members c2, f2, g2, and h2, which engage, respectively, With the U32. The other arm of each lever is arranged to be engaged by a lmember capable of sliding longitudinally with-relation to the shaft a and having' inclined surfaces to rock the levers and produce the necessary longitudinal. movement of the clamping members. These sliding members are shown as sleeves i and c, mounted, respectively, upon the sleeves b and d and provided with annular channels i2 and k2, which receiveforked` members 'i3 and k3,

`,which are mounted, respectively, upon lon- IOO gitudinally-movable rods i4 and 7a4. The said rods are normally movable together in a longitudinal direction, so as to slide the sleeves i and 7c from the position shown, Fig. l, in which they are in engagement with the levers 71, and e, to a position in which they will engage the levers g and f. In the position shown the disk c3, which rotates with the shaft c, is in frictional engagement with the disk d3, which is fast upon the sleeve 07, so that the said sleeve d and the shaft c are looked together, while the disk 7) upon the sleeve b is in frictional engagement with the stationary disk 7)"0, so -thatthe sleeve 7) is prevented from rotation. Under these conditions the support for the intermediate gears b2 is held stationary, so that the rotation of the pulley a will produce a rotation in the opposi te direction of the sleeve d through the agency of the intermediate gears b2 and the internal gear d2, thus causing the said sleeve d to travel in a direction opposite to that of the ulley a and drive the shaft c with it. If, owever, the rods i4 and 764 are moved in the opposite direction, so as to bring the members 'i and 7c into engagement, respectively, with the levers g and f, the sleeve c7 will be disconnected from the shaft and held stationary through the agency of the disk d4 and the disk 740, while the sleeve 7) will be locked to the shaft through the agency of the disk 7) and the disk c2. Under these conditions t-he internal gear d2 will be stationary, so that the rotation of the pulley a acting through the intermediate gears b2 will cause them to roll around the inner periphery of the internal gear and carry with them the sleeve b, to which they are connected, at a lesser speed than that of the pulley, so that the shaft c will travel in the direction of the pulley a, but at a reduced speed. If now it is desired to cause the shaft c to travel in the direction of the pulley a and at a speed equal thereto, it becomes necessary only to lock both the sleeves 7) and d to the shaft, which is the same as connecting one with the other, so that there can be no rotary movement of one relative to the other, the result being that the intermediate gears b2 cannot turn, but act merely as keys to lock the pulley-gear as and the internal gear d2 together, so that the rotation of the pulley a is directly transmitted to the shaft. To accomplish this, it is necessary only to bring the member i into engagement with the lever g and the member 7c into engagement with ythe lever e, and in accordance with the invention it is practicable to accomplish this without any additional shipper mechanism, the same actuating device being used as in the-ordinary slow-speed forward and reversing operations. Inorder that this may be accomplished, the rods i4 and 764, which are normally connected together, are capable of beingdisconn'ected in such a Way that after member 7c, the rod i* becoming one of the said rods has been Ymoved in one direction to operate one"of the "engaging members the said rod can be disconnected and left stationary, while the other rod is moved in the other direction by the same actuating devuie to operate the other engaging member. herein shown, the two rods are mounted in a sleeve or support m, which is connected With the shipper m2, one of the said rods being shown as fastened at m3 in the said sleeve, while the other rod bears against the end of the fastened rod, so as to be pushed thereby in one direction.

The rod 76i is shown as connected with the sleeve or support m, to which in turn the shipper m2 is pivoted, so that the swinging movement of said shipper will produce alongitudinal movement of the rod 7c4 and the fork 7c3 carried thereby. The rod i4 extends into the sleeve or support m, so as to engage the end of the rod kt, so that a movement of the ship er m2 to the left will produce a longitudin( movement in that direction of both the rod 764 and the rod i4, so as to slide the members 7c and c' into engagement, respectively, with the levers f and gf The rod c4, however, may be disconnected from the shipper in case it is desired to leave the member i in engagement with the lever g while the member /c is being moved into engagement with the lever e. To this end the rod i4 is capable of being connected with and disconnected from the member m, the connecting means being herein shown as a latch n, having an inclined face n2 and a shoulder n3 to engage a corresponding shoulder in the rod i4.

Vhen the latcch n is in the position shown in Fig. 1, in which it may be held by means of a spring n4, the rod i4 is connected with the sleeve m, so'as to be moved therewithV in either direction-as, for example, when the members t' 7c are being moved to the position shown. The latch n, however, is under the control of the operator, being preferably connected with a grip m5, pivoted to the shipper m2, near the handle thereof, so that if the shaft c is to be driven ahead at full speed the operator, by pushing the shipper to the left, will carry the member i into engagement with the lever g, and by means of the grip a5 he then disconnects the rod i4 from the shipper, as shown in Fig. 3, so that the movement in the other direction carries therod 7a4 only, and thereby moves the member 7c into engagement with the lever e. To change the conditions, it is necessary only to move the shipper to the left, which will disengage the automatically latched or connected to the shipper at the end of such movement, so that a subsequent movement of the shipper in the opposite direction will move the memberi out of engagement with the lever g. When the latch is not operated, the movement of the shipper IOO ILO

`sleeve interposed between said pulley and in one direction will produce the 'slower forward movement of the shaft, while the movement thereof in the opposite direction will reverse the shaft.

It is not intended to limit the invention to the specific construction and arrangement shown and described, since modifications may be made without departing from the invention.

I claiml. In a shaft-reversing mechanism, the combination with the pulley; of a shaft; a

said shaft and constituting a bearing for the pulley; a gear connected with the pulley; an intermediate gear connected with said sleeve; a second sleeve mounted on the shaft and provided with a gear coperating 4with said intermediate gear; a stationary member; and means coperating with said sleeves for connecting either sleeve with the shaft or with said stationary member, substantially as described.

2. In a shaft-reversing mechanism, the combination with a pulley; of a gear thereon; a shaft withtwo members mounted thereon; an internal gear on one member intermediate gears on the other member in mesh with said internal gear and the gear on the pulley; a stationary member; and means for connecting either of said members with said shaft, and the other with said stationary member to prevent its rotation; and a single devicel cooperating with said means.

3. The combination with a shaft; of a sleeve having a bearing on said shaft; one or more intermediate gears on said sleeve; a pulley mounted on said sleeve; a gear on said pulley in mesh with said intermediate gears; a second sleevemounted on the shaft; an internal gear on said second sleeve in mesh with said intermediate gears; a stationary clutch member corresponding to each sleeve; a shaft clutch member corresponding to each sleeve clutch members connected with each sleeve to coact respectively with the clutch members aforesaid; actuating members, one for each sleeve, interposed between the clutch members thereon to actuate one of them by a movement in one direction, and the other by a movement in the other direction; and a single actuating device for said 1 clutch-operating members, substantially as described.

4. The combination with the shaft; of two clutch members connected therewith; two sleeves having corresponding clutch members, an internal gear on one of said sleeves;

one or more intermediate gears carried by the other sleeve; a pulley loosely mounted on one of said sleeves; a gear on said pulley in mesh with the intermediate gears; stationary clutch members and clutch members mounted on the sleeves to engage said stationary clutch members respectively; longitudinallymovable clutch-operating members; actuating-rods for said clutch-operating members; a shipper connected with said rods and means for disconnecting said shipper from one of said rods but not from the other, substantially as and for the purpose described.

5. In a reversing and speed-changing mechanism, the combination with two longitudinally-movable clutch-operating devices; of two clutch members for each operating device, the said operating devices being located between the said clutch members; a shipperrod made in two parts, one part being con-f nected with one operating device and the other part with the other operating device; a shipper connected with one of the said rods; and a locking device for connecting the said rods together whereby both are operated by the same movement of the shipper, 'as set forth.

6. In a reversing and speed changing mechanism, the combination with two clutchoperating members and clutches operated thereby; of a shipper provided with a support; a rod connected with one clutch-operating member and also with said support; a rod connected with the other operating member and supported in said support; a latch cooperating with the rod last named; and an actuating device for said latch connected with the shipper, as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

CHARLES F. SMITH.

Witnesses:

HENRY J. LrvEnMoRE, NANCY P. FORD. 

